After one too many nights lying awake wondering if he had remembered to close the garage door, Bryan decided to reengineer his automatic door opener. He attached a detector switch to the opener drive rail, which is engaged by the drive shuttle as the door arrives at the fully open position. He wired the switch to a delay timer that begins its count when the switch is closed. When the timing period clocks out, the timer's normally open dry contacts signal the opener to close the door.
Hands-free Garage Door Closer Parts List
Allied Part #
Delay-on make timer relay 120V ac
Octal relay socket
Unidirectional hinge roller switch
6-32 aluminum male-female stand-offs
Conductor 120V ac power vord
Additional parts required: Delay-on make timer relay 24V dc; 24V dc power supply; crimp terminals; small lengths of two conductor wire.
At the Design News webinar on June 27, learn all about aluminum extrusion: designing the right shape so it costs the least, is simplest to manufacture, and best fits the application's structural requirements.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This radio show will show what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.